<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    爱好 <input type="checkbox" name='hobby' value="eat">吃 <input type="checkbox" name='hobby' value="druink">喝

    <hr>

    性别 <input type="radio" name="gender" value="1">男 <input type="radio" name="gender" value="0">女
    
    <hr>

    省: <select name="province" >
        <option value="shanxisheng">山西省</option>
        <option value="shandongsheng">山东省</option>
        <option value="dongbeisheng">东北省</option>
    </select>

</body>
<script>
  let c= $(":checkbox:cheked");
  console.log(c);
  let b=$(":radio:checked");
  console.log(b);
  let d= $("select option:selected");
</script>
</html>